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FAQ + live marketUpdated 2026-03-11
Nike ACG UltraFly Trail
Nike's first serious carbon-plated trail racing shoe with ZoomX foam and Vibram grip, fast and propulsive on moderate terrain but narrow and less confident on technical descents.
Community Score
82/100
Very GoodLensTrail
Comfort7/10
Durability6/10
WidthNarrow fit
Dress codeAthletic
CushioningZoomX
Only the measured sub-scores above are shown directly. The overall score also blends value, style or performance, and broader community sentiment.
Moderate evidence — enough to identify patterns
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Key facts
- Popularity: High profile launch with strong competitive credentials
- Comfort: ZoomX foam is energetic and cushioned for long distances
- Fit: Narrow, especially in the original version's toebox
- Value: $200+, premium but packed with race technology
- Use case: Trail racing, ultramarathons, fast training runs
- Risk: Narrow fit and struggles on highly technical terrain
Shoe intelligence
Comfort 7/10Durability 6/10Narrow fitZoomXHiking
Guide
Full breakdown
The Nike ACG UltraFly Trail is a carbon-plated trail racing shoe released under the ACG (All Conditions Gear) line. It features ZoomX foam for propulsive cushioning, a split carbon fiber FlyPlate, and a Vibram Megagrip outsole. Designed for competitive trail running and ultramarathon racing, it represents Nike's most aggressive push into technical trail footwear, worn by athletes like Western States winner Caleb Olson.
Questions answered
FAQ
Is the Nike ACG UltraFly good for trail running?
It excels on moderate, well-groomed trails where its ZoomX foam and carbon plate deliver fast, propulsive performance. On highly technical, rocky terrain it is less confident — the grip and stability cannot match dedicated technical trail shoes from Salomon or HOKA.
How does the UltraFly Trail fit?
The original version runs notably narrow, especially in the toebox. Runners with wider feet found it uncomfortable over long distances. The UltraFly 2 addressed this with a wider last. Most runners recommend trying before buying or sizing up half a size.
How does it compare to the HOKA Tecton X?
Both are carbon-plated trail racers. The UltraFly feels more propulsive with ZoomX foam, while the Tecton X offers better grip on technical terrain. The choice depends on course profile — smooth trails favor the UltraFly, rocky courses favor the Tecton X.
Is this shoe good for everyday trail running?
It is primarily a racing shoe with race-day foam and a carbon plate. For daily training the ZoomX foam may compress faster than desired, and the price point makes it expensive to use as a daily trainer. Most runners save it for races and faster workouts.
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